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Preparation method of gadolinium oxide-coated ferroferric oxide magnetic fluorescent nano hollow spheres

A technology of ferroferric oxide and fluorescent nanometers, which is applied in the preparation of microspheres, chemical instruments and methods, and the magnetism of inorganic materials. It can solve the problems of particle aggregation and other problems, and achieve the effects of good repeatability, large specific surface area, and simple process.

Inactive Publication Date: 2014-07-16
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a preparation method of gadolinium oxide-wrapped ferric iron tetroxide magnetic fluorescent nano hollow spheres with simple process, safe operation and low cost, which solves the problem of particle aggregation caused by magnetic particles as templates, In order to achieve the purpose of simplifying the experimental difficulties

Method used

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  • Preparation method of gadolinium oxide-coated ferroferric oxide magnetic fluorescent nano hollow spheres
  • Preparation method of gadolinium oxide-coated ferroferric oxide magnetic fluorescent nano hollow spheres

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Experimental program
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Effect test

Embodiment 1

[0025] ① Take 1.5g of nano-microspheres with a particle size of 500nm of silica, add 10ml of distilled water, and sonicate to a uniform colloidal solution.

[0026] ②Weigh 0.268g of ferric nitrate hexahydrate and 0.290g of urea respectively, mix them together, dissolve them in 20ml of distilled water, and add them into a three-necked flask.

[0027] ③Put the mixed solution of ① into the three-neck flask of ②, and add 70ml of distilled water to form a red homogeneous colloidal solution.

[0028] ④Put the three-necked flask into a constant temperature water tank, stir, adjust the temperature of the constant temperature water bath at 95°C, and keep stirring for 4 hours after the system temperature reaches 95°C.

[0029] ⑤ Centrifuge the above mixed solution, wash with double distilled water, and then centrifuge to obtain a reddish-brown solid precipitate.

[0030] ⑥ The above steps are a complete process for one-time coating of particles, and the coating of rare earth element ga...

Embodiment 2

[0037] The proportioning in the method of above-mentioned embodiment 1 is constant, uses silicon dioxide particle diameter 180nm as inner core, carries out coating, then etches away inner core with sodium hydroxide 0.5mol / L, reduces with hydrogen, and reduction temperature remains at 450 ° C, other conditions are the same as in Example 1, Fe 3 o 4 Gd 2 o 3 nano hollow spheres. From Figure 4 It can be seen from the SEM that the overall coating is relatively uniform, monodisperse and regular.

[0038] In conclusion, the present invention reports a method using a hard template method, using silica with different inner diameters as a template, and synthesizing metal Fe with particle inner diameters of about 500nm and 180nm through a hydrolysis process. 3 o 4 Gd 2 o 3 nano hollow spheres. We adopt the wet injection process and reduce it to obtain metallic Fe 3 o 4 Gd 2 o 3 nano hollow spheres.

[0039] The hollow spheres obtained in this patent have a relatively larg...

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Abstract

A preparation method of gadolinium oxide-coated ferroferric oxide magnetic fluorescent nano hollow spheres is provided; a hard template method is utilized, silica with different inner diameters is used as a template, ferric hydroxide is precipitated on a silica gel, then the treated silica gel is used as the template and then is coated with rare earth gadolinium, and thus the Gd2O3-coated Fe3O4 magnetic fluorescent nano hollow spheres with different particle diameter sizes are obtained. The preparation method has the advantages of simple process, low cost and good repeatability, is suitable for large-scale production, and avoids influences brought by magnetic particle agglomeration. The prepared hollow spheres have relatively larger specific surface area; the adjustable range of the particle size is larger, and the adjustable field of the size of the hollow spheres is broadened; meanwhile, the hollow spheres have magnetic and fluorescent properties, enables the orientation to be controlled by adding a magnetic field, and can be used as a drug carrier having perspective optical performance so as to intuitively understood drug moving directions; and the hollow spheres are easily broken under the action of an external force or disturbances, and can be used for contrast agents, biomarkers, magnetic resonance imaging (MRI), and biological and biomedical imaging.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, in particular to a Gd 2 o 3 Pack Fe 3 o 4 A method for preparing magnetic fluorescent nanometer hollow spheres. Background technique [0002] In recent years, with the development of technology, it has been found that, compared with bulk materials, the corresponding hollow spheres of the same material have high specific surface area, better penetration and low density, which are useful in catalysis, encapsulation, cell separation, Chemical reactors, drug delivery, lightweight materials, optoelectronic devices and many other fields have very important applications [(a) C.N.R.Rao, A.Govindaraj, G.Gundiah, S.R.C.Vivekchand, Chem.Eng.Sci. 4665. (b) F. Caruso, Top. Curr. Chem. 2003, 227, 145.]. Therefore, the study of hollow microspheres with different compositions has attracted widespread attention, especially the multifunctional hollow microspheres with optical and magneti...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01F1/11B01J13/02
Inventor 王军李旺宁爱凤郑晓梅
Owner NINGBO UNIV
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